# GravLens3 vs UMStudy

The clearest difference is rating: UMStudy at 5.0 against GravLens3's 3.7. UMStudy also leads on update cadence (every 2 months vs every 17 months). GravLens3's advantage is device support (3 vs 1) and ratings volume (6 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UMStudy holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

GravLens3 ships an update every 17 months, UMStudy every 2 months. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | GravLens3 | UMStudy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (6 ratings)](https://appshunter.io/ios/app/gravlens3/id318275930/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/umstudy/id6749000095/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 4 MB | 50 MB |
| Requires iOS | **6.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Eli Rykoff](https://appshunter.io/developer/318275933) | [Tedu, LLC](https://appshunter.io/developer/1438128366) |

## What reviewers say

### GravLens3

[App page](https://appshunter.io/ios/app/gravlens3/id318275930)

Simulate the effects of gravitational lensing on your iPhone or iPad. Adjust lens parameters and apply distortions to your photos or live camera feed. Share your creations or project them for educational purposes.

**Highlights:** Simulate Hubble Space Telescope images, Adjust lens size and ellipticity, Distort photos from library or camera, Live real-time lensing view, AirPlay and external monitor support, Save and share distorted images

**Features:** macOS Compatibility

**In-app purchases:** none


### UMStudy

[App page](https://appshunter.io/ios/app/umstudy/id6749000095)

This app connects university students with academic support services. Students can book tutor appointments, join study groups, and attend peer-led sessions to enhance their understanding of course material and achieve academic goals.

**Highlights:** Book tutor appointments, Attend drop-in sessions, Find study groups, Peer-led study sessions, Collaborative learning environments, One-on-one academic support

**In-app purchases:** none


## Frequently asked questions

### Is GravLens3 free?

GravLens3 is free to download, with no in-app purchases.

### Is UMStudy free?

UMStudy is free to download, with no in-app purchases.

### Which has better reviews, GravLens3 or UMStudy?

UMStudy is rated higher. GravLens3 averages 3.7 out of 5 from 6 ratings, while UMStudy averages 5.0 from 2 ratings.

### Do GravLens3 or UMStudy have ads?

Neither GravLens3 nor UMStudy shows ads.

### Which is updated more often, GravLens3 or UMStudy?

GravLens3 ships an update every 17 months, and UMStudy every 2 months. Most recently, GravLens3 was updated on September 29, 2026 and UMStudy on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*